Ill go with A..
If I take my 257 WBY out and fire 8 or 10 as fast as I can it gets HOT.. Is it melting?? Id say yes at the leade..minutely.
When rifles are 'shot out' in couple thousand rounds--220 Swift had a reputation for that, I believe. What happened to the barrel to say it was 'shot out'?? Some (much??) of the leade and rifling will be gone.. How so--vaporized or melted?? Is there a difference?
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